Derek Hodgson writes for The Conversation about his theories on the development of writing:
The part of the brain that processes visual information, the visual cortex, evolved over the course of millions of years in a world where reading and writing didn’t exist. So it’s long been a mystery how these skills could appear some 5,000 years ago, with our brains suddenly acquiring the specific ability to make sense of letters. Some researchers believe that the key to understanding this transition is determining how and why humans first began to make repetitive marks.
Recent extensive brain imaging of the visual cortex as people read text has provided important insights into how the brain perceives simple patterns. In my new paper, published in the Journal of Archaeological Science Reports, I analyse such research to argue that the earliest human-made patterns were aesthetic rather than symbolic, and describe what that means for the evolution of reading and writing. […]
In 2000 I first suggested that the way the “early visual cortex” – the location where visual information from the eye first impacts the cortex – processes information gave rise to the ability to engrave simple patterns. We know that this area has neurons coding for edges, lines and “T” junctions. As distilled forms, these shapes preferentially activate the visual cortex. […]
At some point from around 700,000 years ago, this sensitivity to geometry and pattern perception enabled humans to start making refined “Acheulean tools”, which exhibit a certain symmetry. […] The tool making then further promoted an enhanced sensitivity and bias towards patterns in the natural environment, which our ancestors projected onto materials other than the actual tools. For example, they started accidentally making marks on rocks, shells and materials such as ochre. At some point, these unintentional patterns were intentionally copied on such materials – developing into engraved designs and later on into writing.
But how was this possible? Neuroscientific research has shown that writing text involves the premotor cortex of the brain, which drives manual skills. My theory therefore suggests that reading and writing evolved when our passive perception for discerning things started to interact with manual dexterity.
It’s interesting stuff, but I have no way of judging its plausibility, and I invite your thoughts on the matter.
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